explain the method of finding the focal length of a concave mirror
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Answer:
f = focal length
r = radius of curvature
f = r/2
Explanation:
we have a formula f = r/2
it says that focal length is half of radius of curvature
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Answer:
first expose is beam of light and make the point size image and measure the distance between lens and image ... that is ur focal lenght........................
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